The kit was usually carried in pockets sewn into the knee of their flying suits and contained such items as dextrose tablets, atabrine tablets, two compasses (one about the size of a dime and a second one about half that size), pictures of the airmen dressed in civilian clothes, and money of the countries they were flying over. 

They often referred to the photographs as prisoner of war pictures. The pictures were taken so they could be used by the French underground people on fake passports designed to help smuggle Allied airmen out of the German-occupied countries. The airmen's pictures were taken with the airmen wearing foreign-made clothes and were purposely designed to look rather shabby, so they would appear to look more authentic.

The French underground people were very effective in helping Allied airmen escape, either across the Pyrenees Mountains and into neutral Spain or across the border into neutral Switzerland. In these countries, the airmen would then be detained for the duration of the war.

I remember thinking that, if the pictures were used on fake passports and the airmen were dressed in civilian clothing, it would mean almost certain death if they were exposed and captured by the enemy. Under these circumstances, they would be considered spies and not shot-down Allied airmen.